3BHE014557R0003 UN1000B-Z,V3

The UNITROL 1000-15 base design combines microprocessor control with an IGBT power stage to regulate excitation in synchronous generators and synchronous motors. Auxiliary power for the control electronics and power for the excitation stage are separate circuit functions. Machine-voltage and machine-current measurements supply the control system, while the regulated field output acts on the exciter. The supplied 3BHE014557R0003 UN1000B-Z,V3 identity must remain tied to its actual hardware and control-software configuration.

At platform level, automatic voltage, power-factor and reactive-power regulation use PID control, while manual excitation-current regulation uses PI control. Reactive-current droop supports operation in parallel with a network; voltage droop compensation uses communication between regulators for reactive-load sharing in island operation. Soft start and bumpless transfers form part of the base control concept. Enabled modes, machine settings and limiter behavior must match the installed software and excitation design.

The base architecture provides RS-232 communication for the CMT 1000 commissioning tool, RS-485 for reactive-load sharing and CAN communication for local expansion. Digital and analogue interfaces connect external commands, measurements and status signals. Automatic synchronizing and rotating-diode monitoring are separately configured functions; they must not be inferred from the voltage-regulator role or treated as included accessories. Preserve the installed parameter set and confirm the actual V3 interfaces before replacement.